ProSoundWeb Community

Please login or register.

Login with username, password and session length
Advanced search  

Pages: 1 2 3 [All]   Go Down

Author Topic: jbl srx725 fullrange  (Read 3997 times)

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
jbl srx725 fullrange
« on: August 05, 2021, 09:10:38 AM »

hello. for home use as dj i purchased a set of srx725 witch k want to use full range. no place for subs
i will use them flying faced eachother tilted downwards with my dj boot in the middle. now i am running them with an qsc ex4000 with their internal filter but find the lows not deep enough. i tried to pull eq upp from the lows but at 60hz it stops reacting. i see in the spex the-3db is at that point but was thinking could this be the internal filter? coud the oroginal filter cut everything below 60?  i have all hardware to bi amp them (mx1500amp and dcx behringer) could that be worth a trie?   please ur advise
Logged

Caleb Dueck

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1555
Re: jbl srx725 fullrange
« Reply #1 on: August 05, 2021, 02:19:01 PM »

hello. for home use as dj i purchased a set of srx725 witch k want to use full range. no place for subs
i will use them flying faced eachother tilted downwards with my dj boot in the middle. now i am running them with an qsc ex4000 with their internal filter but find the lows not deep enough. i tried to pull eq upp from the lows but at 60hz it stops reacting. i see in the spex the-3db is at that point but was thinking could this be the internal filter? coud the oroginal filter cut everything below 60?  i have all hardware to bi amp them (mx1500amp and dcx behringer) could that be worth a trie?   please ur advise

SRX725 is a speaker, not a subwoofer.  Cone diameter doesn't determine frequency.  You need dedicated subwoofers for bass.
Logged
Experience is something you get right after you need it.

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #2 on: August 05, 2021, 02:38:17 PM »

hello. my preverious set was hk esys. subs are also not really subs with kind a same freq resp but at 1/3of the srx.  when i pull eq up it do sound right for me..not lookin for less than 40hz. just some punchy bass is ok
Logged

David Morison

  • SR Forums
  • Hero Member
  • *
  • Offline Offline
  • Posts: 750
  • Aberdeen, Scotland
Re: jbl srx725 fullrange
« Reply #3 on: August 05, 2021, 04:22:52 PM »

i tried to pull eq upp from the lows but at 60hz it stops reacting. i see in the spex the-3db is at that point but was thinking could this be the internal filter? coud the oroginal filter cut everything below 60?

While technically possible to build a passive filter that cuts the lows, it has serious knock-on effects on cost, weight and quite possibly audio performance, so it's almost never done.

The lack of low bass you notice is simply the level of performance that those drivers, in that cabinet, can deliver - nothing to do with the onboard filter.

There is a slight chance however that room acoustics are causing a bit of a loss of low bass, so try putting them at different locations in the room (eg closer to or further from walls, on the floor vs flown etc) to see if the bass improves at all.
Logged

Paul G. OBrien

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1294
Re: jbl srx725 fullrange
« Reply #4 on: August 05, 2021, 05:39:40 PM »

There is a slight chance however that room acoustics are causing a bit of a loss of low bass,

Actually there is more than a slight chance that the listining position is in a low bass null.
To the OP... try this, boost the lowend as you have done and then move around the room to hear where the bass is heaviest. If you get lucky that will be a suitable place to reposition your mixing desk, but if the room is really small you may find the big bass is in another room in the house.
Logged

Dave Garoutte

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2985
  • San Rafael, CA
Re: jbl srx725 fullrange
« Reply #5 on: August 05, 2021, 05:49:10 PM »

Also make sure the polarity isn't flipped.
Logged
Nothing can be made idiot-proof; only idiot resistant.

Events.  Stage, PA, Lighting and Backline rentals.
Chauvet dealer.  Home of the Angler.
Inventor.  And now, Streaming Video!

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #6 on: August 06, 2021, 03:01:14 AM »

Hello.
i made some pictures to show the room and what i m doing
https://www.dropbox.com/sh/cyiyg2ddgir7cq0/AADKx4p7SBaw8ZCAbO2Y_kd5a?dl=0

first the plan of the srx was to make room on the floor by flying them. so this is kind of a must... if sound can be ok.

u seee the pic hk setup earlier. there are 2subs stacked on 2 others and 2tops hanging. u cant see clear but in the right corner there is a 500l aquarium (filter use)->witch is why im trying to avoid a 18inch :-)   earlier days the 4subs from hk ware at one line at the back against the wall this was best sounding!

so now u will see on the other pics still 2subs stacked against the wall behind the decks but they have to go to make room there.

is i follow your comments i could say my testing i m doing now is kind of useless as the sound will do change. i was planning to do some soundchecking and then hanging them in place but i see what u mean and maybe better have to place them first. maybe its just working out fine then.

u see the pictures right and left upper corners this is where i would like to hang them. i made a "plan" to make clear what i would like to do.  please your advice!! thanks

 


Actually there is more than a slight chance that the listining position is in a low bass null.
To the OP... try this, boost the lowend as you have done and then move around the room to hear where the bass is heaviest. If you get lucky that will be a suitable place to reposition your mixing desk, but if the room is really small you may find the big bass is in another room in the house.
Logged

lindsay Dean

  • Classic LAB
  • Hero Member
  • *
  • Offline Offline
  • Posts: 749
Re: jbl srx725 fullrange
« Reply #7 on: August 06, 2021, 12:56:04 PM »

Just as a side note about the aquarium in the corner, or in the room at high levels
 it's where the fish are going to be most affected.
  It's not really good or happy for the fish to be sonically assaulted.
Logged
"A mans got to know his limitations"
     and Pray for higher guidance

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #8 on: August 06, 2021, 02:28:17 PM »

Thx for the concern! but the aquarium only holds filter material, pumps and sponges it s a sump filter :-) the fish are in the other room :-)


Just as a side note about the aquarium in the corner, or in the room at high levels
 it's where the fish are going to be most affected.
  It's not really good or happy for the fish to be sonically assaulted.
Logged

Don T. Williams

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 991
  • Midas Pro 1 & 2, M32, dbTech T12, T8, S30, DM12
    • Q Systems Music & Sound
Re: jbl srx725 fullrange
« Reply #9 on: August 06, 2021, 04:53:14 PM »

At one time it was recommended that if speakers face each other, the polarity should be flipped on one of the speakers.  Try it both ways and see if that helps.  There are numorious bass "enhansers" that creat the illusion of more bass.  The DBX 120A is well known.  The Peavy Kaos is another.  A competing music store sell one of these on every HOW system.  I'm not certain why or if they get used, but they can certainly do wierd thing to the pastors voice when used incorrectly!
Logged

Art Welter

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2066
Re: jbl srx725 fullrange
« Reply #10 on: August 07, 2021, 05:47:18 PM »

At one time it was recommended that if speakers face each other, the polarity should be flipped on one of the speakers. 
Don,

Whoever recommended that is wrong, unless one driver has been mis-wired, or put in backwards.
Logged

Steve-White

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1152
  • Fort Worth
Re: jbl srx725 fullrange
« Reply #11 on: August 07, 2021, 05:57:23 PM »

Those SRX725's if working properly and powered up right should all but blow that room apart.  I've seen DJ setups with 4508 dual 15's loaded with JBL 2205's, powered with BGW 750's with the stacks on picnic tables outdoors that sounded great - plenty of LF.
Logged

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #12 on: August 09, 2021, 04:06:37 PM »

Those SRX725's if working properly and powered up right should all but blow that room apart.  I've seen DJ setups with 4508 dual 15's loaded with JBL 2205's, powered with BGW 750's with the stacks on picnic tables outdoors that sounded great - plenty of LF.


did check of the +\- they ware ok. also checked for original driver.
disconnected the dcx and connected the old scool eq.  al below 80 +12db  and 40-20 on0 again. did sound kind of ok but i m afraid i m really pushing drivers this way
Logged

Mike Caldwell

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2497
  • Covington, Ohio
    • Mike Caldwell Audio Productions
Re: jbl srx725 fullrange
« Reply #13 on: August 09, 2021, 07:37:52 PM »


did check of the +\- they ware ok. also checked for original driver.
disconnected the dcx and connected the old scool eq.  al below 80 +12db  and 40-20 on0 again. did sound kind of ok but i m afraid i m really pushing drivers this way

Do you mean on the graphic EQ everything from 40 to 80 was boosted +12?

Steve-White

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1152
  • Fort Worth
Re: jbl srx725 fullrange
« Reply #14 on: August 10, 2021, 12:08:04 AM »

If you are in need of more 40hz and lower, why not just fly everything?  Put a mono dual-18 sub in the middle and done.
Logged

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #15 on: August 10, 2021, 02:03:51 AM »

If you are in need of more 40hz and lower, why not just fly everything?  Put a mono dual-18 sub in the middle and done.


yes
Logged

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #16 on: August 10, 2021, 03:40:11 AM »


yes

sorry used wrong quote. yes was on the graphic eq question
Logged

Steve-White

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 1152
  • Fort Worth
Re: jbl srx725 fullrange
« Reply #17 on: August 10, 2021, 06:31:57 AM »

sorry used wrong quote. yes was on the graphic eq question

+12 db @ 40hz is a dangerous setting for your gear.  At the low end of system bandwidth, +6 would be the most I would attempt to use.  And then for playback (recorded music) only where things were controllable.
Logged

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #18 on: August 10, 2021, 03:22:00 PM »

+12 db @ 40hz is a dangerous setting for your gear.  At the low end of system bandwidth, +6 would be the most I would attempt to use.  And then for playback (recorded music) only where things were controllable.


Hey i will try tomorrow (when neighboures are awake) to test with 40Hz 0db.

Today i put one sub horizontal at the ceiling....WOW what a difference in sound!!! the other is still standing in front of the bar(facing eachother) but planning on hanging him also this weekend.


I was also playing with the tought to get an extra EX4000 and run them both bridge each at 1 speaker to get more headroom... really the sound is really ok now but running cliplights kind of fast (beacouse of the +12db... ? )


love to hear your toughts
« Last Edit: August 10, 2021, 03:24:09 PM by elie baele »
Logged

Mike Caldwell

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 2497
  • Covington, Ohio
    • Mike Caldwell Audio Productions
Re: jbl srx725 fullrange
« Reply #19 on: August 10, 2021, 04:24:19 PM »


Hey i will try tomorrow (when neighboures are awake) to test with 40Hz 0db.

Today i put one sub horizontal at the ceiling....WOW what a difference in sound!!! the other is still standing in front of the bar(facing eachother) but planning on hanging him also this weekend.


I was also playing with the tought to get an extra EX4000 and run them both bridge each at 1 speaker to get more headroom... really the sound is really ok now but running cliplights kind of fast (beacouse of the +12db... ? )


love to hear your toughts

You'll have to start being more careful when you run a bridged EX4000 per cabinet.

How are you suspending the 725? Do you have the version with the threaded fly point inserts?

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #20 on: August 11, 2021, 03:30:25 AM »

Logged

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Logged

Scott Holtzman

  • Hero Member
  • *****
  • Offline Offline
  • Posts: 6822
  • Ghost AV - Avon Lake, OH
    • Ghost Audio Visual Systems, LLC
Re: jbl srx725 fullrange
« Reply #22 on: August 30, 2021, 11:49:30 PM »

Hello

speakers nog totally different positionned and moved the dj boothe 40cm to the sweetspot. with 65Hz +13Db Eq sounds phenomenal now!!!


That's a dangerous amount of boost.
Logged
Scott AKA "Skyking" Holtzman

Ghost Audio Visual Solutions, LLC
Cleveland OH
www.ghostav.rocks

elie baele

  • Newbie
  • *
  • Offline Offline
  • Posts: 11
Re: jbl srx725 fullrange
« Reply #23 on: August 31, 2021, 07:59:32 AM »

Hallo, thanks for your answer. assuming the small room i m in i do not use high sound levels.
at the dcx i see i m mostly -40db, sometimas -30 but that is really loud already :-)



That's a dangerous amount of boost.
Logged

ProSoundWeb Community

Re: jbl srx725 fullrange
« Reply #23 on: August 31, 2021, 07:59:32 AM »


Pages: 1 2 3 [All]   Go Up
 



Site Hosted By Ashdown Technologies, Inc.

Page created in 0.04 seconds with 18 queries.